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Safety chapter
Information in the event of an emergency
Summary of relevant ignition hazards and
protective measures put in place for the
Hydro HA4a / in accordance with EN ISO
80079-36
Ignition hazard
Hot surfaces
Exothermic reaction, including the self-combustion of dust
Dust deposits and other material
Additional considerations
Damage to the diaphragm with hazardous media
Electrical bought-in parts (motor, actuator and/or control
drive, proximity switch, ...)
Non-electrical bought-in parts (coupling, ...)
2.7 Emissions
18
WARNING!
Adjusted pressure switches fail
–
The switching point of the 42 V pressure switch
must not be changed.
–
The ATEX pressure switch must not be reprog‐
rammed.
It could result in overheating of the pump.
WARNING!
The inside of the dosing head needs to be constantly
filled with medium in normal mode, and the start-up and
run-down processes have to be designed in such a way
by the operator so that no explosive mixture is produced
inside the dosing head.
In the event of an electrical accident, disconnect the mains cable from the
mains or press the emergency cut-off switch fitted on the side of the
system!
If feed chemical escapes, also depressurise the hydraulic system around
the pump as necessary. Adhere to the safety data sheet for the feed
chemical.
Basic assumption for assessment of the ignition hazards:
With regard to the ignition hazard assessment, it is assumed that the
inside of the dosing head is constantly filled with medium in normal mode
and also that the start-up and run-down processes are designed in such a
way by the operator that no explosive mixture is produced inside the
dosing head.
Protective measures to be observed by the customer
Limitation of the maximum feed chemical temperature to
90 °C
Feed chemicals, which react exothermically with the oil
from the diaphragm intermediate chamber, have to be
considered in terms of the risk.
Regularly and carefully clean the outside of the pump.
The customer must wire the diaphragm rupture indicator
so that it reliably stops the pump as quickly as possible.
Electrical connection by technical personnel.
Refer to the documentation for the bought-in part.
Refer to the documentation for the bought-in part.
The sound pressure level is listed in the "Technical data".
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